3 releases
0.1.2 | Apr 23, 2021 |
---|---|
0.1.1 | Apr 23, 2021 |
0.1.0 | Apr 23, 2021 |
#10 in #repetition
18KB
382 lines
Genesys
Just a simple text format for declaring basic components and convert them to rust data types under build-time.
No more repetitive macro calls or extensive declarations for simple structures, just a blissfull list of components with simple control of use of crate/module/function and derive for all, modules or specific structs.
Empowered by pest
Todo
- Use crates/mods in modules
- Custom derive for modules
- Impl Default for tuple structs
- Generate enums
- Identify single tuple structs primitive type to generate relevant ops code
Usage
build.rs
use std::env;
use std::path::PathBuf;
fn main() {
println!("cargo:rerun-if-changed=src/components");
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
genesys::generate("src/components", out_path.join("components.rs")).unwrap();
}
main.rs/lib.rs
Add this to the beginning of your file
include!(concat!(env!("OUT_DIR"), "/components.rs"));
Cheat sheet, genesys format
# Default use, applied to all modules
global_use {
# Comma-separated modules/functions
bevy::prelude::Entity,
bevy::prelude::*
}
# Default derive, applied to all components
global_derive (Debug, Entity)
# Components are either empty structs, tuple structs or named structs (enum comming soon)
# One component declaration per line
MyComponent
MyTupleComponent str # str gets translated to String
MyNamedComponent name: String, weight: f32
# Modules are declared with the modulus symbol "%"
%object {
# Local use(overrides global use)
use {
entities::MySpecialEntity
}
# Local derive(overrides global)
derive (MySpecialEntity)
Name str
Weight f32
%item {
Item
Food
TradeGood
Weapon
Armor
}
}
Binary
cargo run -- example/components # Prints components as rust
cargo run -- example/components components.rs # Writes output to components.rs
Dependencies
~2.2–3MB
~59K SLoC